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AI 根据所提供的论文材料归类:摘要直接讨论因果图、因果效应识别及一致性和可交换性假设。

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Depicting deterministic variables within directed acyclic graphs (DAGs): An aid for identifying and interpreting causal effects involving tautological associations, compositional data, and composite variables

在有向无环图中表示确定性变量:辅助识别与解释因果效应

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代码、数据与补充材料

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关注这篇论文的作者
Laurie Berrie
Kellyn F. Arnold
Georgia D. Tomova
Mark S. Gilthorpe

在有向无环图中表示确定性变量:辅助识别与解释因果效应

研究问题
代数构造的复合变量及组成数据中的整体变量,如何在因果图中表示,以避免误解同义关联并明确所研究的因果效应?
方法与思路
作者提出两步流程:先将所有变量纳入 DAG,再明确选择关注确定性变量还是其决定性父变量,用图辅助分析目标与调整选择。
材料陈述的贡献
摘要称这种表示有助于辨认共享代数来源的关联,理解对整体变量条件化的后果,并加强对总效应、相对效应及识别假设的审视。
阅读关注点
应核对确定性关系在图中的表示、整体条件化如何改变效应含义,以及复合变量对应的一致性和可交换性假设如何解释。
阅读边界
来源为 arXiv 预印本,同行评审及期刊接收未经核实;摘要介绍的是分析辅助框架,未说明各类确定性结构下的完整识别条件。

原文摘要

Deterministic variables are variables that are fully explained by one or more parent variables. They commonly arise when a variable has been algebraically constructed from one or more parent variables, as with composite variables, and in compositional data, where the 'whole' variable is determined from its 'parts'. This article introduces how deterministic variables may be depicted within directed acyclic graphs (DAGs) to help with identifying and interpreting causal effects involving tautological associations, compositional data, and composite variables. We propose a two-step approach in which all variables are initially considered, and an explicit choice is then made whether to focus on the deterministic variable(s) or the determining parents. Depicting deterministic variables within DAGs bring several benefits. It is easier to identify and avoid misinterpreting tautological associations, i.e., self-fulfilling associations between variables with shared algebraic parent variables. In compositional data, it is easier to understand the consequences of conditioning on the 'whole' variable, and correctly identify total and relative causal effects. For composite variables, it encourages greater consideration of the target estimand and greater scrutiny of the consistency and exchangeability assumptions. DAGs with deterministic variables are a useful aid for planning and interpreting analyses involving tautological associations, compositional data, and/or composite variables.

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